Sears 50mm f/1.7 Auto MC. If you’re looking to purchase this lens I always check Adorama and Ebay for good deals. It helps me if you purchase it through one of these links here in this review. When you purchase through these links it financially enables me to devote time to develop this site further. Thanks for the help! -Todd

Barrel
Metal

Weight
8.1 oz (229g)

Focus Ring
Rubber on Metal.

Close Focus
1.5 feet (0.45 meters).

Filter Threads
52mm, Metal

Aperture Ring
Metal.

Diaphragm
6 blades stopping down to f/16.

Mount
Mine came in Pentax Metal Mount.

Made in
Japan

 

 

Sharpness
f/1.7 A little soft with lower contrast and a bit of spherical and chromatic aberration.
f/2 Sharpens up a little bit with better contrast but still a fair bit of chromatic aberration.
f/2.8: Sharpens up nicely with good contrast and less chromatic aberrations.
f/3.5: Sharper yet with more contrast and almost no chromatic aberrations.
f/4: Sharper yet.
f/8: Sharper yet but the start of some diffusion.

Vignetting

Quite a bit of vignetting at f/1.7 which quickly starts to clear at f/2 and almost gone by f/3.5.

Distortion
Normal amount of barrel distortion common for most 50mm lenses.

Bokeh
The blur is not too bad but suffers from spherical aberration which is distracting.

 

 

Recommendations

On MF Camera
Optics:          ★ ★ ★
Mechanics:   ★ ★ ★ ★
Ergonomics: ★ ★ ★ ★
Usefulness:  ★ ★ ★
Availability:   ★
Overall:         ★ ★

On AF Camera
Ergonomics: ★ ★ ★
Overall:        ★ ★
Out of 5

This lens has pretty good optics stopped down to f/2. It is built like a tank and very easy to use. The spherical aberration bothers me a bit because I like to shoot portraits with the backgrounds blurred. The bokeh is a bit funny because of this.
If you find one for cheap you can’t go wrong but I wouldn’t go out of my way to find one.

 

Did this review help?
My hopes are to take the time to continue developing this website with more test photo based reviews. If you are ever interested in purchasing this lens or other photography equipment please do so through these links here in this review. I always check Adorama and Ebay for good deals. This helps support my family and allows me to take more time for the site. The best part is this site is free for you and I link good deals I find!

Sometimes these links will actually give you better deals then typical retail prices! I personally buy from the links I have listed whether looking for new gear or fun old stuff. I can personally attest to their good & safe service from years of experience. Thanks again to you, our readers, for supporting us! -Todd